Think about this for a second. You have a Major League Baseball player who starts the game in the outfield and is listed on the lineup card as an outfielder. But, as the game gets to the fifth inning, your original starter is tired and struggling. The immediate thought would be to go to the bullpen and bring in your long reliever. However, instead of that, what if your next man to hit the mound was – in the outfield?
Or reverse that and your starting pitcher has gone five or six innings and needs to come out, but instead, he stays in the game to hit and a double-switch is in effect.